You are trying to figure out the rate in which the tram changed elevation. You can figure this out using the information you're given.
You are told that the tram changed elevation by 63 meters in 7 seconds. By dividing the total number of meters traveled, 63, by the number of seconds, 7, you can figure out how many
meters the tram traveled
each second.
-------
Answer: The tram changed elevation by 9 meters per second.